High-current-output audion.



H. J. VAN DER BIJL &. A. MoL. NIGOLSON. I

HIGH GURRENT OUTPUT AUDION. APPLICATION FILED JUNE 6', 1914.

1,1 39,042, Patented Mar. 2, 1915.

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To all whom it may concern:

Be it known that we, Hnmmm JOHA-NNES VAN DER BIJL and ALEXANDER MCLEANN10- ons'on, subjectsof the King of Great Britain, residing at-New York,in the county of New York andStateof New York, and at Tarrytown, in thecounty of Westchester and State of New York, respectively, have inventedcertain new and useful Improvements in High-Current-Output Audions, ofwhich the following is a full, clear, concise, and exact description.

This invention relates to audions having a high current output and itsobject is to increase the efliciency of such audions.

In audions the closeness of the input electrode and filament to eachother is conducive to efliciency of operation. Furthermore, the distanceof the output electrode from the filament and the amount of obstructionthe input electrode ofiers between the filament and output electrode,are factors having a bearing on the current output of the audion.

The present invention is concerned more particularly with theconstruction and relative arrangement of the input electrode,filament-and output electrode for the purpose of securing the maximumefliciency. In accordance with this invention the input electrode andfilament are placed side by side facing the output electrode, said inputelectrode and filament preferably being arranged in a common planeparallel to the plane of the output electrode.

The invention may be more readily under stood by reference to theaccompanying drawings, in which- Figures 1 and 2 are perspective viewsof two diflerent embodiments of the invention.

Like reference characters refer to like parts in both figures of thedrawings.

Referring first to Fig. 1, the input electrode is shown as consisting ofone or more rectangular plates or strips 1, 1, two of such plates beingshown in the drawings, electrically connected together and having theiradjacent side edges slightly spaced apart and parallel to each other.Lying between said parallel side edges is the. filament 2. The filamentand the input electrode are The output electrode preferably consists, as

Specification of Letters latent.

' flown, NEW YORK, ASSIGNORS 'ro wnsritnn memo COMPANY,

Patented'Mar. 2, 1915.

Application filed June 6, 1914. Serial No. 843,501.

shown, of a air of electrically connected rectangular p ates '3, 3located upon opposite sides'of the plane of said filament and inputelectrode-and parallel thereto. With such structure and arrangement oftheparts, the nput electrode is near to the filament, said inputelectrode presents minimum obstruction between the filament and theoutput electrode, and the output electrode presents a largesurfacefacing the filament.

In Fig. 2 the input electrode is in the form of a plurality of parallelwires 1 electrically connected together at their ends. The filament iscomposed of a plurality of strands or threads 2, the several wires 1 ofthe input electrode lying between the several strands 2 of the filament.This provides a large filament area which, it has been dis- 70 covered,is conducive to efficiency in this hlgh current output type of audion.Moreover, with such structure and arrangement, the several parts of theinput electrode are brought into close relation with the filament. Theoutput electrode preferably, as shown, consists of a pair ofelectrically connected rectangular plates 3", 3, located upon oppositesides of the plane of said input electrode said bulb.

The two audion structures hereinbefore described both give a highcurrent output. The modification shown in Fig. 1 tends to the hi gherdegree of amplification and hence the greater efficiency. However, if ahigh current output be especially desirable, the modification shown inFig. 2 is preferable.

What is claimed is:

1. An audion having an input electrode and a filament side by side andfacing an output electrode at approximately equal distances from saidinput electrode andfilament.

2. An audion having an input electrode and a filament in a common plane,and an output electrode spaced at approximately the same distance fromsaid input electrode and filament.

3. An audion having an input electrode and a filament in a common planeand an output electrode in a plane parallel .thereto.

4. An audion having an input electrode and a filament located in closerelation to each other in a common plane and an output electrode facingsaid input electrode and filament and slightly spaced at approxi-' saidinput electrode and in the same plane therewith, and an output electrodein a plane parallel to the plane of said input electrode and filament.

7. An audion having an input electrode consisting of a plurality ofparallel wires, and a filament consisting of threads parallel to and inthe same plane with said wlres.

v 8. An audion having an input electrode consisting of a plurality ofparallel wires,-

and a filament consisting of threads parallel witg said wires and in thesame plane therewit 9. An audion having an input electrode consisting ofa plurality of parallel wires,

a filament having strands in close relationto said wires, said electrodeWires and filament strands being parallel to one another in a commonplane, and a plate parallel to said plane.

10. An audionhaving an input electrode and a filament in' a commonplane, and an output electrode comprising a pair of plates uponoppositesides of said plane in parallel relation thereto. V v

11. 'An audion having an input electrode consisting of a plurality ofparallel wires, a filament having strands in'close relation to saidwires, said electrode'wires and filament strands being parallel to oneanother in a common plane,.and an output electrode comprising a pair ofplates upon opposite sides of said plane in parallel relation thereto.

In witness whereof, We hereunto subscribe our names this 3 day of JuneA.'D., 1914.

HENDRIX JOHANNES vnq mm BIJL. ALEXANDER MOLEAN NIGOLSON.

Witnesses:

.E. EDLER, I K. L. STAHL.

